The nurse receives an order to give 1 mg of dexamethasone at 2300. At 0800 the next morning, plasma cortisol levels are drawn and reveal higher than normal levels. The patient asks the nurse what the lab results indicate

The nurse would be correct to tell the patient that the overnight dexamethasone suppression test is used to diagnose
a. adrenal crisis.
b. secondary adrenal insufficiency.
c. primary adrenal insufficiency.
d. Cushing's syndrome.


ANS: D
The overnight dexamethasone suppression test is used to diagnose Cushing's syndrome.
The test is not used to diagnose adrenal crisis or primary or secondary adrenal insufficiency.

Nursing

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